Benchmark: trigata - MeasureThat.net

Script Preparation code:

function rand(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
}

function angle(x, y) {
  let result = Math.atan(y / x);
  if (x < 0) {
    result += Math.PI;
  } else if (y < 0) {
    result += 2 * Math.PI;
  }
  return result;
}

function angle2(x, y) {
    if (x == 0)
      return (y == 0) ? 0 : (y > 0 ? Math.PI/2 : -Math.PI/2)
  
    var atan_xy = Math.atan(y / x)
    if (x > 0)
      return atan_xy
    else // x < 0
      return atan_xy + (y < 0 ? -Math.PI : Math.PI)
}

function myAtan2(a, b)
{
    var atan2val;
    if (b > 0) {
        atan2val = Math.atan(a/b);
    }
    else if ((b < 0) && (a >= 0)) {
        atan2val = Math.atan(a/b) + Math.PI;
    }
    else if ((b < 0) && (a < 0)) {
        atan2val = Math.atan(a/b) - Math.PI;
    }
    else if ((b = 0) && (a > 0)) {
        atan2val = Math.PI / 2;
    }
    else if ((b = 0) && (a < 0)) {
        atan2val = 0 - (Math.PI / 2 );
    }
    else if ((b = 0) && (a = 0)) {
        atan2val = 1000;
    }
  
    return atan2val;
}

Tests:

native
var xO = rand(1, 1000); var yO = rand(1, 1000); Math.atan(yO, xO);
alt
var xT = rand(1, 1000); var yT = rand(1, 1000); angle(xT, yT);
alt2
var xD = rand(1, 1000); var yD = rand(1, 1000); angle2(xD, yD);
al3
var xC = rand(1, 1000); var yC = rand(1, 1000); myAtan2(xC, yC);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
native
alt
alt2
al3

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark measures the performance of three different implementations of the `atan` function in JavaScript:

1. `Math.atan(yO, xO)`: This is the native implementation of `atan` in JavaScript. It uses a single call to `Math.atan2(yO, xO)` under the hood.
2. `angle(xT, yT)`: This is an alternative implementation of `atan` defined by the author. It calculates the tangent and then applies the correct quadrant adjustment manually.
3. `angle2(xD, yD)`: Similar to `angle`, but uses a different method to calculate the result.
4. `myAtan2(xC, yC)`: This is another implementation of `atan` that takes into account the signs of both coordinates.

**Options compared**

The benchmark compares the performance of these four implementations:

* Native implementation (`Math.atan(yO, xO)`)
* Alternative implementation 1 (`angle(xT, yT)`)
* Alternative implementation 2 (`angle2(xD, yD)`)
* Custom implementation (`myAtan2(xC, yC)`)

**Pros and Cons**

Here are some pros and cons of each approach:

* **Native implementation (`Math.atan(yO, xO)`)**:
	+ Pros: Built-in function, likely optimized for performance
	+ Cons: May not be as efficient as custom implementations due to overhead of calling a built-in function
* **Alternative implementation 1 (`angle(xT, yT)`)**:
	+ Pros: Simple and easy to understand
	+ Cons: Manual quadrant adjustment can lead to errors if not implemented correctly
* **Alternative implementation 2 (`angle2(xD, yD)`)**:
	+ Pros: Similar to alternative implementation 1 but with a different method for calculating the result
	+ Cons: Same limitations as alternative implementation 1 regarding manual quadrant adjustment
* **Custom implementation (`myAtan2(xC, yC)`)**:
	+ Pros: Can be optimized specifically for this benchmark and may outperform native or alternative implementations
	+ Cons: Requires more code and potentially more maintenance effort

**Library**

There is no explicit library mentioned in the provided code. However, it's worth noting that `Math.atan2` is a built-in JavaScript function that uses the `atan` function from the math library.

**Special JS feature or syntax**

The benchmark does not explicitly use any special JavaScript features or syntax.

**Other alternatives**

If you're interested in exploring alternative implementations of the `atan` function, here are some options:

* **Bourgeat's atan2**: This is a high-performance implementation of `atan2` that has been optimized for various platforms.
* **Fast Atan2**: Another high-performance implementation of `atan2` that uses techniques like SIMD instructions to accelerate calculations.

Keep in mind that these alternatives may have different trade-offs regarding performance, complexity, and maintainability compared to the custom implementation provided.

Related benchmarks:

trigata (version: 0)

Comparing performance of: native vs alt vs alt2 vs al3

Created: 8 years ago by: Guest

Jump to the latest result

native

alt

alt2

al3

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):